<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
    if (!is_uploaded_file($_FILES["upload"]["tmp_name"]))
    //是否存在文件
    {
         echo "图片不存在!";
         exit;
    }
    $file = $_FILES["upload"];

    $filename=$file["tmp_name"];
    $image_size = getimagesize($filename);
    $pinfo=pathinfo($file["name"]);
    $ftype=$pinfo['extension'];
    $destination = $destination_folder.time().".".$ftype;
    if (file_exists($destination) && $overwrite != true)
    {
        echo "同名文件已经存在了";
        exit;
    }

    if(!move_uploaded_file ($filename, $destination))
    {
        echo "移动文件出错";
        exit;
    }

    $pinfo=pathinfo($destination);
    $fname=$pinfo[basename];
    echo " <font color=red>已经成功上传</font><br>文件名:  <font color=blue>".$destination_folder.$fname."</font><br>";
    echo " 宽度:".$image_size[0];
    echo " 长度:".$image_size[1];
    echo "<br> 大小:".$file["size"]." bytes";

    if($watermark==1)
    {
        $iinfo=getimagesize($destination,$iinfo);
        $nimage=imagecreatetruecolor($image_size[0],$image_size[1]);
        $white=imagecolorallocate($nimage,255,255,255);
        $black=imagecolorallocate($nimage,0,0,0);
        $red=imagecolorallocate($nimage,255,0,0);
        imagefill($nimage,0,0,$white);
        switch ($iinfo[2])
        {
            case 1:
            $simage =imagecreatefromgif($destination);
            break;
            case 2:
            $simage =imagecreatefromjpeg($destination);
            break;
            case 3:
            $simage =imagecreatefrompng($destination);
            break;
            case 6:
            $simage =imagecreatefromwbmp($destination);
            break;
            default:
            die("不支持的文件类型");
            exit;
        }

        imagecopy($nimage,$simage,0,0,0,0,$image_size[0],$image_size[1]);
        imagefilledrectangle($nimage,1,$image_size[1]-15,80,$image_size[1],$white);

        switch($watertype)
        {
            case 1:   //加水印字符串
            imagestring($nimage,2,3,$image_size[1]-15,$waterstring,$black);
            break;
            case 2:   //加水印图片
            $simage1 =imagecreatefromgif("xplore.gif");
            imagecopy($nimage,$simage1,0,0,0,0,85,15);
            imagedestroy($simage1);
            break;
        }

        switch ($iinfo[2])
        {
            case 1:
            //imagegif($nimage, $destination);
            imagejpeg($nimage, $destination);
            break;
            case 2:
            imagejpeg($nimage, $destination);
            break;
            case 3:
            imagepng($nimage, $destination);
            break;
            case 6:
            imagewbmp($nimage, $destination);
            //imagejpeg($nimage, $destination);
            break;
        }

        //覆盖原上传文件
        imagedestroy($nimage);
        imagedestroy($simage);
    }

    if($imgpreview==1)
    {
    echo "<br>图片预览:<br>";
    echo "<img src=\"".$destination."\" width=".($image_size[0]*$imgpreviewsize)." height=".($image_size[1]*$imgpreviewsize);
    echo " alt=\"图片预览:\r文件名:".$destination."\r上传时间:\">";
    }
}
?>
